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2 years ago

Please help me solve for x

Mathematics

1 answer:

andreev551 [17]2 years ago

5 0

Answer:

x=9

Step-by-step explanation:

Corresponding angles are equal

7x - 3 = 60

7x. = 63

÷7

x = 9

Check:

7x9 - 3 = 60

Hope this helps!

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PLEASE HURRY 16 points to whoever gets it right what is the perimeter of the figure? measurement numbers 10in, 17in, 11in, 19in

Serjik [45]

Answer:

Option D - 57 inches

Step-by-step explanation:

The Perimeter of figure are given in the question that has to be added together. The measure are ten inch plus seventeen inch plus eleven inch plus ninteen inch. Once all the perimeter are combined together it gives the required measurement. Finally the required perimeter measurement is fifty seven inch as given in the MCQ of the question.

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3 years ago

Using the equation shown below calculate the q value of vertex? y= 2x2square +4x -9

Ugo [173]

Answer:

The vertex is (-1,-11).

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4 years ago

Assume the sample variances to be continuous measurements. Find the probability that a random sample of 25observations, from a n

konstantin123 [22]

Answer:

a) $P(4S^2 > 4*9.1) = P(\chi^2_{24} >36.4) = 0.0502$

b) $P(13.848$ Step-by-step explanation:

Previous concepts

The Chi Square distribution is the distribution of the sum of squared standard normal deviates .

For this case we assume that the sample variance is given by $S^2$ and we select a random sample of size n from a normal population with a population variance $\sigma^2$ . And we define the following statistic:

$T = \frac{(n-1) S^2}{\sigma^2}$

And the distribution for this statistic is $T \sim \chi^2_{n-1}$

For this case we know that n =25 and $\sigma^2 = 6$ so then our statistic would be given by:

$\chi^2 = \frac{(n-1)S^2}{\sigma^2}=\frac{24 S^2}{6}= 4S^2$

With 25-1 =24 degrees of freedom.

Solution to the problem

Part a

For this case we want this probability:

$P(S^2 > 9.1)$

And we can multiply the inequality by 4 on both sides and we got:

$P(4S^2 > 4*9.1) = P(\chi^2_{24} >36.4) = 0.0502$

And we can use the following excel code to find it: "=1-CHISQ.DIST(36.4,24,TRUE)"

Part b

For this case we want this probability:

$P(3.462 < S^2$

If we multiply the inequality by 4 on all the terms we got:

$P(3.462*4 < 4S^2 < 4*10.745)= P(13.848< \chi^2$ And we can find this probability like this: $P(13.848$ And we use the following code to find the answer in excel: "=CHISQ.DIST(42.98,24,TRUE)-CHISQ.DIST(13.848,24,TRUE)"

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3 years ago